Tristated output to two common Base transistor issue

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  1. - 8th September 2007, 17:07 #27
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    RussMartin
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    Lightbulb

    Saturation is not possible, here are the results
    Thanks for showing us an in situ analysis. Your measurements should enable you to immediately infer what is wrong:

    The circuit, as configured, doesn't permit enough voltage across the transistor! (What is Vf for the LEDs?)

    If you remove the 22 ohm resistor to ground, you will get different results.
    Last edited by RussMartin; - 8th September 2007 at 17:13.
    Russ
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